Added tests

4 files changed, 270 insertions, 1 deletions

diff --git a/poetry.lock b/poetry.lock
index 38b2ae7..f08231b 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -67,6 +67,84 @@ files = [
 ]
 
 [[package]]
+name = "colorama"
+version = "0.4.6"
+description = "Cross-platform colored terminal text."
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,>=2.7"
+files = [
+    {file = "colorama-0.4.6-py2.py3-none-any.whl", hash = "sha256:4f1d9991f5acc0ca119f9d443620b77f9d6b33703e51011c16baf57afb285fc6"},
+    {file = "colorama-0.4.6.tar.gz", hash = "sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44"},
+]
+
+[[package]]
+name = "coverage"
+version = "7.4.3"
+description = "Code coverage measurement for Python"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "coverage-7.4.3-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:8580b827d4746d47294c0e0b92854c85a92c2227927433998f0d3320ae8a71b6"},
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+    {file = "coverage-7.4.3-cp310-cp310-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:ba3a8aaed13770e970b3df46980cb068d1c24af1a1968b7818b69af8c4347efb"},
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+    {file = "coverage-7.4.3-cp310-cp310-musllinux_1_1_i686.whl", hash = "sha256:506edb1dd49e13a2d4cac6a5173317b82a23c9d6e8df63efb4f0380de0fbccbc"},
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+    {file = "coverage-7.4.3-cp310-cp310-win_amd64.whl", hash = "sha256:18d90523ce7553dd0b7e23cbb28865db23cddfd683a38fb224115f7826de78d0"},
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+    {file = "coverage-7.4.3-cp311-cp311-win_amd64.whl", hash = "sha256:18c7320695c949de11a351742ee001849912fd57e62a706d83dfc1581897fa2e"},
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+    {file = "coverage-7.4.3-cp312-cp312-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:b9a4a8dd3dcf4cbd3165737358e4d7dfbd9d59902ad11e3b15eebb6393b0446e"},
+    {file = "coverage-7.4.3-cp312-cp312-musllinux_1_1_aarch64.whl", hash = "sha256:062b0a75d9261e2f9c6d071753f7eef0fc9caf3a2c82d36d76667ba7b6470003"},
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+    {file = "coverage-7.4.3-cp312-cp312-win32.whl", hash = "sha256:37389611ba54fd6d278fde86eb2c013c8e50232e38f5c68235d09d0a3f8aa352"},
+    {file = "coverage-7.4.3-cp312-cp312-win_amd64.whl", hash = "sha256:d25b937a5d9ffa857d41be042b4238dd61db888533b53bc76dc082cb5a15e914"},
+    {file = "coverage-7.4.3-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:28ca2098939eabab044ad68850aac8f8db6bf0b29bc7f2887d05889b17346454"},
+    {file = "coverage-7.4.3-cp38-cp38-macosx_11_0_arm64.whl", hash = "sha256:280459f0a03cecbe8800786cdc23067a8fc64c0bd51dc614008d9c36e1659d7e"},
+    {file = "coverage-7.4.3-cp38-cp38-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:6c0cdedd3500e0511eac1517bf560149764b7d8e65cb800d8bf1c63ebf39edd2"},
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+    {file = "coverage-7.4.3-cp38-cp38-win_amd64.whl", hash = "sha256:1bf25fbca0c8d121a3e92a2a0555c7e5bc981aee5c3fdaf4bb7809f410f696b9"},
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+    {file = "coverage-7.4.3-cp39-cp39-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:4af154d617c875b52651dd8dd17a31270c495082f3d55f6128e7629658d63765"},
+    {file = "coverage-7.4.3-cp39-cp39-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:8640f1fde5e1b8e3439fe482cdc2b0bb6c329f4bb161927c28d2e8879c6029ee"},
+    {file = "coverage-7.4.3-cp39-cp39-musllinux_1_1_aarch64.whl", hash = "sha256:69b9f6f66c0af29642e73a520b6fed25ff9fd69a25975ebe6acb297234eda501"},
+    {file = "coverage-7.4.3-cp39-cp39-musllinux_1_1_i686.whl", hash = "sha256:0842571634f39016a6c03e9d4aba502be652a6e4455fadb73cd3a3a49173e38f"},
+    {file = "coverage-7.4.3-cp39-cp39-musllinux_1_1_x86_64.whl", hash = "sha256:a78ed23b08e8ab524551f52953a8a05d61c3a760781762aac49f8de6eede8c45"},
+    {file = "coverage-7.4.3-cp39-cp39-win32.whl", hash = "sha256:c0524de3ff096e15fcbfe8f056fdb4ea0bf497d584454f344d59fce069d3e6e9"},
+    {file = "coverage-7.4.3-cp39-cp39-win_amd64.whl", hash = "sha256:0209a6369ccce576b43bb227dc8322d8ef9e323d089c6f3f26a597b09cb4d2aa"},
+    {file = "coverage-7.4.3-pp38.pp39.pp310-none-any.whl", hash = "sha256:7cbde573904625509a3f37b6fecea974e363460b556a627c60dc2f47e2fffa51"},
+    {file = "coverage-7.4.3.tar.gz", hash = "sha256:276f6077a5c61447a48d133ed13e759c09e62aff0dc84274a68dc18660104d52"},
+]
+
+[package.dependencies]
+tomli = {version = "*", optional = true, markers = "python_full_version <= \"3.11.0a6\" and extra == \"toml\""}
+
+[package.extras]
+toml = ["tomli"]
+
+[[package]]
 name = "distlib"
 version = "0.3.8"
 description = "Distribution utilities"
@@ -152,6 +230,17 @@ perf = ["ipython"]
 testing = ["flufl.flake8", "importlib-resources (>=1.3)", "packaging", "pyfakefs", "pytest (>=6)", "pytest-black (>=0.3.7)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=2.2)", "pytest-mypy (>=0.9.1)", "pytest-perf (>=0.9.2)", "pytest-ruff"]
 
 [[package]]
+name = "iniconfig"
+version = "2.0.0"
+description = "brain-dead simple config-ini parsing"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "iniconfig-2.0.0-py3-none-any.whl", hash = "sha256:b6a85871a79d2e3b22d2d1b94ac2824226a63c6b741c88f7ae975f18b6778374"},
+    {file = "iniconfig-2.0.0.tar.gz", hash = "sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b3"},
+]
+
+[[package]]
 name = "jedi"
 version = "0.19.1"
 description = "An autocompletion tool for Python that can be used for text editors."
@@ -200,6 +289,17 @@ files = [
 setuptools = "*"
 
 [[package]]
+name = "packaging"
+version = "23.2"
+description = "Core utilities for Python packages"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "packaging-23.2-py3-none-any.whl", hash = "sha256:8c491190033a9af7e1d931d0b5dacc2ef47509b34dd0de67ed209b5203fc88c7"},
+    {file = "packaging-23.2.tar.gz", hash = "sha256:048fb0e9405036518eaaf48a55953c750c11e1a1b68e0dd1a9d62ed0c092cfc5"},
+]
+
+[[package]]
 name = "parso"
 version = "0.8.3"
 description = "A Python Parser"
@@ -276,6 +376,46 @@ files = [
 chardet = "*"
 
 [[package]]
+name = "pytest"
+version = "8.1.1"
+description = "pytest: simple powerful testing with Python"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "pytest-8.1.1-py3-none-any.whl", hash = "sha256:2a8386cfc11fa9d2c50ee7b2a57e7d898ef90470a7a34c4b949ff59662bb78b7"},
+    {file = "pytest-8.1.1.tar.gz", hash = "sha256:ac978141a75948948817d360297b7aae0fcb9d6ff6bc9ec6d514b85d5a65c044"},
+]
+
+[package.dependencies]
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
+exceptiongroup = {version = ">=1.0.0rc8", markers = "python_version < \"3.11\""}
+iniconfig = "*"
+packaging = "*"
+pluggy = ">=1.4,<2.0"
+tomli = {version = ">=1", markers = "python_version < \"3.11\""}
+
+[package.extras]
+testing = ["argcomplete", "attrs (>=19.2)", "hypothesis (>=3.56)", "mock", "pygments (>=2.7.2)", "requests", "setuptools", "xmlschema"]
+
+[[package]]
+name = "pytest-cov"
+version = "4.1.0"
+description = "Pytest plugin for measuring coverage."
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "pytest-cov-4.1.0.tar.gz", hash = "sha256:3904b13dfbfec47f003b8e77fd5b589cd11904a21ddf1ab38a64f204d6a10ef6"},
+    {file = "pytest_cov-4.1.0-py3-none-any.whl", hash = "sha256:6ba70b9e97e69fcc3fb45bfeab2d0a138fb65c4d0d6a41ef33983ad114be8c3a"},
+]
+
+[package.dependencies]
+coverage = {version = ">=5.2.1", extras = ["toml"]}
+pytest = ">=4.6"
+
+[package.extras]
+testing = ["fields", "hunter", "process-tests", "pytest-xdist", "six", "virtualenv"]
+
+[[package]]
 name = "python-lsp-jsonrpc"
 version = "1.1.2"
 description = "JSON RPC 2.0 server library"
@@ -582,4 +722,4 @@ testing = ["big-O", "jaraco.functools", "jaraco.itertools", "more-itertools", "p
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "8ca7b838828d2b2467e9afe69bd10a6f34b82c51ccb93fb3ca63c9acb7921f83"
+content-hash = "5e9a8804beafb40057ae0bb14da2d31eccaff2c936df22e3eb7a19eb1be9ebb6"
diff --git a/pyproject.toml b/pyproject.toml
index f5da613..0842466 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,6 +22,8 @@ classifiers = [
 python = "^3.9"
 pysrt = "^1.1.2"
 chardet = "^5.2.0"
+pytest = "^8.1.1"
+pytest-cov = "^4.1.0"
 
 [tool.poetry.group.dev.dependencies]
 python-lsp-server = "^1.10.0"
@@ -79,3 +81,8 @@ max-args = 6
 
 [tool.ruff.lint.pydocstyle]
 convention = "pep257"
+
+[tool.pytest.ini_options]
+pythonpath = [
+    "."
+]
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tests/__init__.py
diff --git a/tests/test_subscleaner.py b/tests/test_subscleaner.py
new file mode 100644
index 0000000..73e7453
--- /dev/null
+++ b/tests/test_subscleaner.py
@@ -0,0 +1,122 @@
+"""Unit tests for the subscleaner module."""
+
+from io import StringIO
+from unittest.mock import patch
+
+import pytest
+
+from src.subscleaner.subscleaner import ads_in_line, main, process_file
+
+
+@pytest.fixture
+def sample_srt_content():
+    """Return a sample SRT content."""
+    return """1
+00:00:01,000 --> 00:00:03,000
+This is a sample subtitle.
+
+2
+00:00:04,000 --> 00:00:06,000
+OpenSubtitles
+
+3
+00:00:07,000 --> 00:00:09,000
+Another sample subtitle.
+"""
+
+
+def create_sample_srt_file(tmpdir, content):
+    """Create a sample SRT file with the given content."""
+    file_path = tmpdir.join("sample.srt")
+    file_path.write(content)
+    return str(file_path)
+
+
+@pytest.mark.parametrize(
+    "line, expected",
+    [
+        ("This is a normal line", False),
+        ("This line contains OpenSubtitles", True),
+        ("Subtitles by XYZ", True),
+    ],
+)
+def test_ads_in_line(line, expected):
+    """
+    Test the ads_in_line function with different input lines and expected results.
+
+    Args:
+        line (str): The input line to be tested.
+        expected (bool): The expected result (True if the line contains an ad, False otherwise).
+    """
+    assert ads_in_line(line) is expected
+
+
+def test_process_file_no_modification(tmpdir, sample_srt_content):
+    """
+    Test the process_file function when the file does not require modification.
+
+    Args:
+        tmpdir (pytest.fixture): A temporary directory for creating the sample SRT file.
+        sample_srt_content (str): The sample SRT content.
+    """
+    file_path = create_sample_srt_file(tmpdir, sample_srt_content)
+    with patch("src.subscleaner.subscleaner.os.path.getctime", return_value=0):
+        assert process_file(file_path) is False
+
+
+def test_process_file_with_modification(tmpdir, sample_srt_content):
+    """
+    Test the process_file function when the file requires modification.
+
+    Args:
+        tmpdir (pytest.fixture): A temporary directory for creating the sample SRT file.
+        sample_srt_content (str): The sample SRT content.
+    """
+    file_path = create_sample_srt_file(tmpdir, sample_srt_content)
+    with patch("src.subscleaner.subscleaner.os.path.getctime", return_value=9999999999):
+        assert process_file(file_path) is True
+
+
+def test_process_file_error(tmpdir):
+    """
+    Test the process_file function when an error occurs (e.g., file not found).
+
+    Args:
+        tmpdir (pytest.fixture): A temporary directory.
+    """
+    file_path = tmpdir.join("nonexistent.srt")
+    assert process_file(str(file_path)) is False
+
+
+def test_main_no_modification(tmpdir, sample_srt_content):
+    """
+    Test the main function when no files require modification.
+
+    Args:
+        tmpdir (pytest.fixture): A temporary directory for creating the sample SRT file.
+        sample_srt_content (str): The sample SRT content.
+    """
+    file_path = create_sample_srt_file(tmpdir, sample_srt_content)
+    with (
+        patch("sys.stdin", StringIO(file_path)),
+        patch("src.subscleaner.subscleaner.process_file", return_value=False) as mock_process_file,
+    ):
+        main()
+        mock_process_file.assert_called_once_with(file_path)
+
+
+def test_main_with_modification(tmpdir, sample_srt_content):
+    """
+    Test the main function when files require modification.
+
+    Args:
+        tmpdir (pytest.fixture): A temporary directory for creating the sample SRT file.
+        sample_srt_content (str): The sample SRT content.
+    """
+    file_path = create_sample_srt_file(tmpdir, sample_srt_content)
+    with (
+        patch("sys.stdin", StringIO(file_path)),
+        patch("src.subscleaner.subscleaner.process_file", return_value=True) as mock_process_file,
+    ):
+        main()
+        mock_process_file.assert_called_once_with(file_path)